Check if text user has input contains only letters.

[ZhuXian]

Hello,Since I'm relatively new to PHP, I'm having troubles finding a way to check if the text user has input has only letters,and if it has only numbers or mixed it would print an error.Any help welcome.

[boen_robot]

There are numerous ways to do that, but the most popular one is with regular expressions.You can find more information about their syntax at the manual or at other sites.For doing the check you want, one way is to use the following:

if (preg_match('/[:^alpha:]/', $input)) {    echo 'Error: The input can only contain letters. No spaces, no digits, no punctuation - nothing other than letters.';} else {    echo 'OK. The input contains only letters.';}

[ZhuXian]

Thank you!